Exhibit 31.2
Certification of the Chief Financial Officer Pursuant to
Rule 13a-14(a) or 15d-14(a) under the Securities Exchange Act of 1934, as
adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
I, R. Stephen Armstrong, certify that:
1. I have reviewed this quarterly report on Form 10-Q/A for the period ended January 28, 2012 of Patterson Companies, Inc.;
2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.
| Date: March 12, 2012 | /s/ R. STEPHEN ARMSTRONG | |||||
| R. Stephen Armstrong | ||||||
| Executive Vice President, Chief Financial Officer and Treasurer | ||||||
